Tabulating mechanism for typewriter or like machines



M. w. NEWBERRY 2,852,122

Sept. 16, 1958 Y TABULATING MECHANISM FOR TYPEWRITER OR LIKE MACHINES 3 Sheets-Sheeti- Filed June 10. 1952 INVENTOR M5768 WNEWBERRY W Sept. 16, 1955 v M. w. NEWBERRY 2,852,122

. TABULATING MECHANISM FOR TYPEWRITER OR LIKE MACHINES Filed June 10. '1952 3 Sheets-Sheet 2- INVENTOR ME I68 W. N EWBERRY ATTORNEYS atent ice TABULATING MECHANESM F OR TYPEWRIT ER OR LIKE MACHINES Application June 1952, Serial No. 292,640

Claims. (Cl. 197-178) This invention relates to tabulating mechanism for typewriting and like machines, and more particularly to tabulating mechanism of the kind which includes a tabulator stop on the main or stationary frame, and a tabulator stop on the traveling carriage, and mechanism for projecting one of the stops from an inactive position, in which it is not engageable with the other of the stops, to an active position in which it is engageable with the other of the stops.

Mechanism embodying the invention is adapted for use generally in connection with tabulating mechanisms of various kinds; but has special utility when embodied in tabulating mechanisms of the ten key decimal, or denominational kind in which depression of a selected one of a plurality of tabulator keys will effect movement of the carriage to a selected columnar or decimal position, thus facilitating the listing of multi-digit numbers in columns in proper ordinal or decimal point positions.

An object of the invention is to provide mechanism of the kind referred to including an improved arrangement of parts for mounting a stop device and for moving it from its normal or inoperative position to a position in which it is operative for arresting the machine carriage at the end of a tabulating run.

Another object of the invention is to provide a stop mounting and moving structure of the character stated which is adapted for mounting a plurality of stops, such as denominational stops, and for moving them individually and selectively into operative position.

Another object of the invention is to provide a tabulating mechanism including means for retaining a stop device in operative position during a tabulating run of the carriage; and inertia controlled means for releasing the retaining means substantially immediately upon arrival of the carriage at the desired tabulated position if the carriage is moving relatively slowly so as not to rebound appreciably, and for delaying the releasing of the retaining means at the end of relatively fast tabulating runs so as to give the carriage time to return to the desired tabulated position in the event the carriage rebounds therefrom an appreciable amount after engagement of the carriage-mounted stop with the frame-mounted stop.

A further object of the invention is to provide such an inertia controlledmechanism in which the retaining means includes a latch which is adapted to be operated by an interponent connected to the latch by impositive motion transmitting means, and in which the interponent is adapted to be moved in response to the carn'ages approaching its tabulated position.

Other objects of? the invention will become apparent from a reading of the following description of a preferred embodiment of the inventiom'the appended claims, and the accompanying drawings, in which:

Figure 1 is a vertical sectional view, force and aft of the front part of a typewriter embodying the invention, some parts being shown in elevation, the movable parts being shown in their normal positions;

Fatented Sept. 16, 1958 m it Figure 2 is a horizontal sectional view on the irregular line 22 of Figure 1;

Figure 3 is a fragmentary view, partly in vertical section on the line 33 in Figure 1, and partly in elevation;

Figure 4 is a vertical sectional view, fore and aft of the rear part of the typewriter, drawn on an enlarged scale, some parts being shown in elevation, and the movable parts being shown in their normal positions;

Figure 5 is a fragmentary view, partly in vertical section, fore and aft of the machine and partly in elevation, showing a modification or adaptation of the invention to a typewriter equipped with a single frame-mounted tabular stop;

Figure 6 is a perspective view of an operating lever;

Figure 7 is a rear elevational view, with some parts shown in section, of frame-mounted tabulating mechanism, the parts being shown in their normal or inactive positions; I

Figure 8 is a fragmentary view, partly in top plan and partly in horizontal section, showing parts of the framemounted tabulating mechanism in their normal positions;

Figure 9 is a fragmentary view, partly intop plan and partly in horizontal section, showing certain parts of the frame-mounted tabulating mechanism in the operative positions which they occupy at or about the time of arresting the tabulating movement of the typewriter carriage; and

Figure 10 is a fragmenary top plan view of. mechanism for latching the frame-mounted tabulating parts in their active positions.

The typewriting mechanism shown by way of example as embodying the invention in a preferred form is generally similar in many respects to the Royal standard ofiice typewriter and the Royal electric typewriter. It includes a main frame element A provided with a lower track or rail 1 on which a carriage element B, including end plates 2 and 3, is mounted for horizontal letter spacing and return travel by means of a carriage or top rail 4 and ball rollers, one of which is shown at 5 in Figure 1. The carriage B is equipped with the usual cylinder or platen C.

Mounted on the main frame for vertical shifting movements is a segment 6 which supports a full complement of type bars, one of which is shown at 7 pivoted as at 8 on the segment. The type bars may be operated by links, one of which is indicated at 9, Which may be connected to any suitable key operated or key controlled mechanism. Shifting of the segment for changing the case of typing may be effected by a link 10 pivoted at its upper end to the segment 6 and connected to suitable actuating mechanism, for example, mechanism of the kind disclosed in the Kupper Patent No. 2,590,777, issued March 25, 1952.

The carriage B is urged to the left, that is, in the letter spacing or typing spacing direction, by suitable means such as a conventional spring drum (not shown) which exerts a steady pull on a draw band connected by a clip 11 to an ear 12 on the right hand carriage end plate 2. Movement of the carriage to the left under the urge of the spring drum or other driving mechanism is controlled by feed controlling mechanism, as shown an escapement mechanism including a rack 13 carried by an angle bar or rail 14 having rearwardly extending arms 15 pivotally mounted on the carriage at 16. Springs 17, connected to rearwardly extending portions of the arms 15 and anchored at 18 on the carriage, normally hold the escapement rack 13 in the position shown in Figure 4, in which the rack meshes with an escapement pinion 19 journalled on a shaft 20 carried by a frame-mounted bracket 21. The pinion 19 is fast with an escapement wheel 22 adapted to rotate about the shaft 20 and to 3 cooperate with escapement pawls or dogs (not shown) which may be of the kind and operated in the manner disclosed, for example, in the Hart United States Patent No. 2,563,722, granted August 7, 1951.

In operation, when the escapement dog mechanism is actuated, the wheel 22 is permitted to turn in step-bystep increments so as to permit the rack 13, and, consequently, the carriage to be fed to the left in the direction of typing.

The tabulating mechanism includes a support generally designated 23 mounted on the carriage comprising upper and lower rack bars 24 and 25 respectively formed with transverse grooves 26, 27 which register with each other and which are spaced longitudinally of the rack bars at letter space intervals.

Mounted on the stop frame or support 23 is a plurality of laterally settable stop devices, several of which are designated 28 and are shown in their normally inoperative positions, and others of which 28 are shown in their rearwardly projected or operative positions. The tabu lar stop means 28-28 are similar to individual stops disclosed in the patent to Myers et al. No. 1,892,071, issued December 27, 1932. Each includes a bridge or central'portion 29, upper lugs 30 and 31, which project alongside opposite sides of the upper rack bar 24, and lower lugs 32 and 33 which project downwardly alongside opposite sides of the bottom rack bar 25. Each tabular stop part is provided with a spring 34- mounted on a pin 35, with one end hooked at 36 around the edge of the tabular stop just above the lug 32, the other end of the spring being curved as at 37 so as to press against the top rack bar 24. The arrangement is such that each tabular stop can be shifted transversely of the frame 23 to an operative position at 28' or to an inoperative position shown at 28, the spring 34 frictionally and yieldably maintaining the stop in whichever position it has been set.

When a tabular stop is set in its operative position as shown at 28' in Figure 4, its rear edge projects toward the back of the machine sufficiently to be engaged by one of a plurality of frame-mounted stop devices adapted selectively and controllably to be moved into or out of the path of the operatively positioned stop 28'. In the illustrative embodiment of the invention, the framemounted stop devices are so constructed and arranged in combination with other elements that when one has been moved to operative position it will be set or latched automatically to remain there until a tabulating operation has been completed, without its being necessary for a key or other device which effected movement of the device to operative position to be held depressed or otherwise actuated. Thus the arrangement is such that a momentary operation of a tabular key or mechanism controlled thereby will set the selected frame-mounted stop device in its operative position where it will remain until the tabulat-- ing operation has been completed, even through the tabular key or mechanism controlled thereby is returned to its inactive or normal position before the tabulating operation has been completed.

In the form shown, four frame-mounted stop devices 38, each in the form of a blade, are mounted in a pack side by side at the rear of the typewriter. Each blade 38 includes a stop head 3? and a depending stem 40, the lower end of which is twisted to provide a connecting portion 41. The number of stop devices 38 may be varied in accordance with the desired operating capacity of the machine, which will depend upon the maximum number of denominational stop positions expected to be required for the intended use. All of the stop devices 38 normally are disposed so as not to engage a carriage mounted stop 28' set in operative position, but the devices 38 are so mounted that a desired one, that is one occupying a particular denominational position, may be selected and first moved vertically to an intermediate position in which it still is not engageable with the operatively set stop 28 but in which it is coupled to an actuator adapted to move the selected stop device horizontally to an operative position in which it is engageable with the operatively set stop 28'. In the illustrative embodiment of the invention the means for mounting the stop blades 38 for the movements explained above comprises a support generally designated 42, including a bracket 43 secured to the main frame A and a plate 44 secured to the bracket 42 by a screw 45, a spacer 46, and screws 47. The plate 44 is formed with an upper horizontal guide bar 48.

Each stop device or blade 38 is formed with an upper vertical guide slot 49 which extends downwardly from the upper horizontal edge of the stop head 39 and normally receives the guide bar 48. All of the blades 38 normally are held in their upper positions as shown in Figure 4 by selecting mechanism operated by or under the control of denominational tabulating keys 50 mounted at the front of the machine as shown in Figure 1, there being one key 50 operatively associated with each of the blades 38. As shown in Figure 1, each key 50 comprises a stem 51 which extends vertically through a slot 52 in the front plate or masking part 53 of the frame A. Each key stem is formed with a stop part 54 cooperable with a frame part 55 for limiting downward movement of the key, and with a stop part 56 cooperable with a part 57 of the frame plate 53 for limiting upward movement of the key. The lower end 58 of each key rests on one of a number of fingers 5? formed on a universal plate 68, one end of which is pivoted at 61 on the frame A, and the other end of which is equipped with an extension 62 secured in adjusted position on the plate 60 by a set screw 63, the extension 62 being pivoted at 64 to the frame A. A link 65 pivotally connected at its lower end to an ear 66 on the universal plate 60 is pivotally connected at its upper end at 67 to a lever 68 which is pivoted at 69 to a frame cross bar 70. A spring 71 interposed between the lever 68 and an arm 72 on a lever generally designated 73 and pivoted as at 74 on a frame cross bar 75, urges the lever 68 clockwise to the normal position shown in Figure 1. The clockwise movement of the lever 68 under the urge of the spring 71 is limited by a frame-mounted cushion stop 76, and the counterclockwise or depressing movement of the lever 68 is limited by a frame-mounted cushion stop 77. The arrangement is such that when the universal plate 60 is rocked clockwise by depression of any one of the keys 50 the link 65 will pull downwardly upon the lever 68 and rock it counterclockwise so as to effect transmission of power to the actuator for operating the selected stop device 38, as will be described in detail hereinafter.

Each key 50 is arranged to effect initial movement of an associated stop device 38 from its normal position shown in Figure 4 downwardly to its intermediate position previously referred to, so that when the actuator is moved the selected blade will be set in operative position. For this purpose a wire-like operating connection generally designated 78 is interposed between each key 50 and one of the stop devices 38. The connection 78 is formed at its front end with a bent crank part 79 equipped with a spool-like fitting 80 which is received by the bifurcated lowerend 58 of the associated key stem 51.

Near their front ends, the connections 78 are pivotally mounted on the frame A by a top front pivot plate 81 secured to the cross bar 70by screws 82 and a bottom front pivot plate 83 secured to' the plate 81 by screws 84; the top and bottom pivot plates 81 and 83 being formed with registering slots which cooperate to provide pivot bearings for, the member 78. The member 78 is formed at an intermediate point withla vertically offset part 85 which terminates inan upwardly and 'rearwardly inclined part 86 pivotally mounted on the lower end of the sup porting bracket 44. As shown in Figures 4 and 7, a slotted pivot plate 87is secured to the lower end of the plate 44 by screws 88 so astg prpyide pivots for the rear ends of the connecting members 78. To the rear of the plate 44 the member 78 is formed with a bent crank 89 having a threaded crank pin part 90 extending through and having threaded connection with the part 41 of the stop device 38.

In operation, when a key 50 is depressed, the associated wire-like connection 78 is rocked counterclockwise, as viewed from the rear of the machine, causing the crank part 89-90 at the rear of the machine to pull downwardly on the selected or associated blade 38, and move the latter to its intermediate position in which it will becoupled to the actuator. Also, as previously explained generally, power mechanism will be set in operationfor moving the actuator so as in turn to move the selected'blade 38 coupled thereto to its engaging position with respect to the stop 28' on the carriage.

The actuating mechanism for moving a selected and intermediately positioned blade 38 to its engaging position includes a bracket 91 secured to the frame A and serving to mount a shaft 92 for both rocking and axial shifting movements. The actuator is generally designated 93 and isshown as including a hub 94 secured to the shaft 92 by a set screw 95. The actuator 93 is formed with an upper arm 96 extending from which is a horizontal part 97 formed with a vertical extension 98 positioned in front of the horizontal guide bar 48 of the support 42. A stop finger 99 integral with the actuator upper arm 96 projects behind the bracket 43 for limiting rocking movement of the actuator in the counterclockwise direction. An abutment finger 100 at the upper end of the actuator arm 96 is interposed between the leftmost (as viewed from the front of the machine, or rightmost as viewed in Figure 7) stop blade 38 and the upper end of the bracket 43. i

The shaft 92 is mounted for both rocking and axial shifting movements by bearings 101 and 102 on the support 42 and is urged toward the left as viewed in Figure 7, or toward the right as viewed from the front of the machine, by a spring 103 interposed between a collar 104 on the shaft and the bearing 102. Normally the shaft 92 and the actuator 93 are in the positions shown in Figure 7 in which the vertical extension 98 on the actuator is disposed alongside a locating ear 105 adjustably mounted on the support guide bar 48 by a screw 106 extending through a slot 107 in the car 105. In this position of the parts, a projection 98- eccentrically and adjustably mounted on the actuator 93 by a screw 98 presses against the blade 38 most remote from the abutment finger 100, and holds the blades 38 crowded against each other and against the abutment finger 100, and holds the latter against the upper part of the support 42, as shown in Figures 7 and 8.

When the actuator 93 is in its normal position, its horizontal part 97 underlies slots 108 extending upwardly from the bottom horizontal edges of the heads 39 of the stop blades 38, the actuator part 97 being spaced below the heads 39 so thatif the actuator were rocked with the parts in these positions, no blade 38 would be coupled to the actuator. However, when a selected blade 38 is lowered by depression of the associated key 50 in the manner previously described, the slot 108 of the selected blade will move over the actuator part 97 so as to couple the blade to the actuator. Consequently, subsequent counterclockwise rocking of the actuator 93 will cause the front surface of its part 97 to press horizontally against the front wall of the slot 108 of the lowered blade 38, thereby moving the upper end of the blade 38 forwardly so as to position the stop head 39 in the path of the operatively set stop 28' on the carriage. Rocking of the selected blade 38 is enabled by slight looseness of the threaded connection between its lower end portion 41 and the threaded crank pin part of the associated connection 78, the inherent resiliency of the wire-like connection '78 also contributing to facile rocking of the stop 38.

Considered in further detail, each device 38 has a first 49 which is longer than the relatively short rear wall of the slot 49. The long front wall a normally engages the guide part 48 for determining the home position of the device 38 in which the latter is not engageable with the tubular stop means 28' on the carriage. The long rear edge of the slot 108 constitutes a second 7 guide surface b parallel to and opposed infacing direction to the first guide surface a; and the short front edge of the slot 108 constitutes an operating surface 0 parallel to and op maed in facing direction to the second guide surface I). The actuator part 97 has a rear guide face d parallel to and opposed in facing direction to the second guide surface b on the device 38, and normally engages this second guide surface so as to assist in maintaining the device 38 in its normal position. The front of the actuator part 97 provides an operating face e parallel to and opposed in direction to the guide face d at the rear of the part 97. The operating face e normally is relatively displaced from the operating surface 0 of the device 38 so as not to be engageable therewith. When the stop device 38 is moved downwardly and parallel to the sur faces and faces referred to above, the operating surface 0 on the device 38 is juxtaposed relatively to the operating face 2 on the actuator part 97. Consequently, when the actuator part 97 is moved forwardly, its operating face e presses against the juxtaposed operating surface 0 of the device 38 to move the latter forwardly into a position in which it will be engageable with the tabular stop means 28' on the carriage.

Mechanism is provided for simultaneously rocking the actuator 93 counterclockwise as viewed in Figure 4 for effecting'the operations of the blades 38 referred to above, and substantially simultaneously lifting the escapement rack 13 to condition the feed controlling mechanism to enable the carriage to perform a tabulating run under the urge of its drive means including the draw band clip 12, previously referred to. In the form shown, a bracket 189 secured to the frame A by screws 110 mounts a shaft 111 and a lever 112 secured thereto for rocking movements. The lower end of the lever 112 is pivoted at 113 to a link 114 which in turn is pivoted at 115 to the lower end of the actuator 93. Consequently, counterclockwise rocking of the actuator 93 will be accompanied by counterclockwise rocking of the lever 112.

The escapement rack 13 is disengaged from the escapement pinion 19 in response to the counterclockwise rocking of the lever 112. For effecting this operation a lifting lever 116 is pivoted on the frame at 117 and has an arm 118 extending under the horizontal part 119 of the .bar 14. The lower end of the lifting lever 116 is formed with an ear 120 disposed in front of a rounded part 121 at the top of the lever 112, the arrrangement being such that when the .lever 112 is rocked counterclockwise its part 121 will press against the ear 120 so as to rock the lifting lever 116 clockwise, causing its arm 118 to lift the bar 1 thereby raising the rack 13 and disengaging it from the escapement pinion 19.

Tabulation effecting mechanism for rocking the shaft 111 to operate the actuator 93 and disengage the escapement rack 13, and for maintaining the parts in their operated positions, includes an operating lever 122 secured to the shaft 111 by set screws 123. The lever 122 is formed with a latch part 124 cooperable with a latch 125 pivoted at 126 on a bracket 127 secured to the frame A by screws 128. An interponent 129 is pivoted at 130 on the latch 125. An impositive motion transmitting connection, as shown a spring 131, connected between a stud 132 on the latch and a stud 133 on the interponent, urges the interponent against a stop stud 134 on the latch 125 which determines the normal relative positions of the interponent 129 and latch 125 as shown in Figure 8. The interponent 129 is formed with a depending ear 135 connected to which is a tensile spring 136 anchored to an ear 137 on the bracket 127. The interponent ear 135 extends "7 alongside a collar part 138 secured to the shaft 92 by a set screw 139.

Considering the operation of the parts described thus far, it will first be assumed that they all are in their nor- H mal positions as shown in Figures 1, 4, 7, and 8. When a selected key 50 (say, the rightmost key as viewed from the front of the machine) is depressed, the associated wire-like connection 78 is operated to lower the associated stop blade 38 to its intermediate position and couple it to the actuator 93. Simultaneously, the universal plate 60 is rocked to elfect operation of power mechanism, later to be described, for rocking the lever122 so as to disengage the escapement rack 13 from the pinion 19 and rock the actuator 93 to its operated position shown in Figure 9, causing the selected blade 38 to be positioned in the path of the set carriage-mounted stop 28'. The rocking of the actuator 93 moves its upward extension 98 away from the locating ear 105 so as to permit the spring 1% to move the shaft 92 and the actuator toward the ieft, as viewed in Figures 7 and 8,'until the end 94 of the actuator hub 98 engages the adjacent surface 102a of the bearing 102. The rocking of the operating lever 122 will position its latch part 124 in front of a nose 125 of the latch 125 so as to permit the spring 136 to rock the interponent and the latch 125 to position the nose 125 behind the latch part 124, as shown in Figure 10, to thereby then maintain the lever 122 in its rocked position, and thus to retain the selected stop 38 in its operative position while also maintaining the escapement mechanism disabled. Consequently the carriage will be enabled to perform a tabulating run until arrested by engagement of the set stop 28 with the selected stop device 38.

When the carriage approaches the end of its tabulating run, and the stop 28' engages the operatively positioned stop head 39, all of the stop heads 39, the actuator 93, and the shaft 92 will be moved toward the right as viewed in Figures 7 and 8, until the abutment finger 109 is arrested by the upper part of the support 42, the parts then being in the positions shown in Figure 9. The axial shifting of the shaft 92 at this time is made use of for disengaging the latch 125 from the operating lever 122 so as to enable the latter, together with the actuator and the escapement disabling mechanism, to be returned to their normal positions.

If the carriage has performed a relatively long tabulating run and consequently has acquired a relatively high speed prior to engagement of the stop 28' with the selected stop 38, there will be a tendency for the carriage to rebound upon engagement of the abutment finger 1110 with the upper part of the .support 42, so that if the latch 125 were released immediately upon the axial shifting movement of the shaft 92, the escapement mechanism might again be rendered operative while the carriage is displaced from its proper tabulating position due to the rebound. This would result in final locating of the carriage in a position displaced from the desired tabulation position, which would be undesirable. Accordingly, it is desirable for the releasing of the latch 125 to be delayed until after any rebounding of the carriage has been corrected by its returning to stopped position with the stop 28' pressing against the selected stop 38 and the latter pressing through the other stops 38 against the abutment finger 1%, and with the latter being pressed against the upper part of the support 42. On the other hand, if the carriage has performed only a relatively short tabulating run, and has acquired relatively less speed, the tendency of the carriage to rebound is not operatively significant so that the latch 125 may, without ill effect, he released immediately upon movement of the parts to their stopping positions as shown in Figure 9.

In accordance with the invention the delayed or the immediate releasing of the latch 125, according to the speed of the carriage, is provided for by constructing the latch 125 and mounting it so that its inertia characteristics will be so related to its mounting and to the charac- 8 V teristics of the spring 131 that a relatively slow application of latch-releasing effort will effect substantially immediate releasing of the latch, whereas application of relatively fast releasing effort will release the latch only after a delay sufficient to enable the carriage to settle back to its intended tabulated position following any rebounding. In the form shown, the latch is provided with a weight 149 of such mass and so positioned with respect to the pivots 126 and as to provide the required relationship between the inertia of the latch and the characteristics of the spring 136,

Considering now the manner of releasing the latch when the carriage approaches its stopping position relatively slowly, the axial shifting of the actuator 93 and the shaft 92 causes the color 138 on the shaft 92 to press against the ear on the interponent 129. The tension of the spring 131 is sufiicient in relation to'the inertia of the latch 125 to cause the interponent and latch to be rocked substantially simultaneously, or as a unit, about the latch pivot 126 so as to displace the latch nose 125 from the latch part 124 of the lever 122 without delay. 0n the other hand, if the carriage is moving rapidly when its stop 28' engages the stop head 39, the shaft 92 and collar 138 will be moved quickly so as to urge the interponent 129 to rock abruptly counterclockwise about its pivot 130 on the latch 125. Under these conditions the inertia of the latch 125 is sufficient to prevent the latch from following the movement of the interponent 129 immediately, so that the spring 131 yields and enables the interponent 129 to rock relatively to the latch 125 to the position shown in Figure 10, wherein a nose 152 on the interponent is disposed alongside a controlling stop car 153 on the bracket 127. With the parts thus positioned, the latch 125 will be held against rocking about its pivot 126. Thereafter, when the carriage rebounds, theshaft collar 138 will be moved toward the left, as viewed in Figure 10, so as to permit the interponent 129 to rock clockwise under the urging of the spring 136. This will displace the interponent nose 152 from the car 153, and permit the latch 125 and the interponent 129 to move counterclockwise about the pivot 126 when a subsequent movement of the shaft 92 toward the right results from settling of the carriage to its desired tabulated position. Consequently, the latch 125 will be released and the parts controlled by the latch will be restored to their normal positions.

Effort for rocking the operating lever 122 for effecting the operations described above is supplied by a pull link 141 pivoted at 142 to a lever 143 which is mounted to rock on a pivot 144 on the lever 122. A pin 145 on the lever 122 projects through a hole 146 in the lever 143 so as to provide for limited rocking of the lever 143 on the lever 122 against the urge of a spring 147 interposed between an arm 148 on the lever 143 and an arm 149 on the lever 122. A normalizing spring 150 is connected between the pivot stud 142 and an car 151 on the frame A.

Normally the parts just referred to are in the positions shown in Figure 4, with the spring 150 tending to rock the lever 143 clockwise so as to maintain the bottom of the hole 146 in contact with the pin 145 on the lever 122. The levers 122 and 143 are maintained against further clockwise rocking under the urge of the spring 150 by means of the connections between the lever 122 and the actuator 143, the vertical extension 98 of which is in engagement with the horizontal guide bar 48.

-In order to effect counterclockwise rocking of the lever 122 to cause operation of the tabulating mechanism as described above, the link 141 is pulled forwardly by mechanism to be described later, so as to tend to rock the lever 143 counterclockwise about its pivot 144. This will tension the spring 147 additionally, and will rock the lever 122 counterclockwise. If a pulling effort is applied suddenly to the link 14-1, the spring 147 will be extended so as to cushion the movement transmitted to the lever 122 and its associated parts, thereby preventing undue shock and minimizing the danger of breakage of the parts. The relative cushioning movement between the levers 143 and 122 will be limited by engagement of the top of the hole 146 with the top of the pin 145.

Means are provided for operating the mechanism for releasing the latch 125 to restore the actuator 93 to its normal position in the event that the carriage is accidentally caused to perform a tabulating run without any stop blade 38 having been set in position for engagement with the carriage-mounted stop 28. For this purpose a stop plate 154 is secured to the carriage-mounted toothed bar 25 by a bolt 155 in-such position that an ear 156 on the plate 154 will engage a face 100 on the actuator abutment finger 100 so as to move the actuator to the right as viewed in Figures 7, 8, and 9. As previously explained, this rightward movement of the actuator and the associated shaft 92 will cause the latch 125 to be disengaged. As shown in Figure 4, the extreme upper forward portion of the abutment finger 108 is cut out as at G so as not to be engaged by a carriage-mounted stop 28'.

As shown in Figures 8 and 9, the locating ear 105 on the guide bar 48 has an inclined or chambered edge 105 which assists in returning the actuator 93 and shaft 92 axially to their home positions when the actuator is rocked from its projected position to the retracted position shown in Figure 4.

The mechanism described above may be used to advantage with any suitable mechanism for delivering actuating effort to a main actuating or impulse transmitting part, e. g. the pulllink 141. It can, however, be used to greatest advantage in connection with power operated actuating means, and is illustrated as being operable by a preferred form of power driven means, generally designated D. This mechanism is generally similar to but embodies improvements in mechanism disclosed in the Kupper United States Patent No. 2,567,945, granted September 18, 1951. It includes a driving element, which operates continuously, and controllable driving connections, which normally are inoperative or ineffective, but which may be conditioned by the operator to effect operative driving connection between the continuously moving driving member and the pull link 141. The driver is constituted by a continuously rotating element, more particularly a toothed snatch roll or bar 157, which may be of known form, and which is adapted to be driven in the direction of the arrow x in Figure 1 by any suitable means, but preferably by an electric motor (not shown).

The means for transmitting drive from the driver 157 to the link 1 41 includes an actuator 158 which extends fore and aft of the typewriter and above the member 157. The actuator 158 is pivoted as at 159 to a lever 168 at a point off-set relatively to the pivotal mounting 161 of the lever on a fixed frame cross bar 162. The actuator has a forwardly extending part 163 projecting under an abutment or guide plate 164 mounted on the frame cross bar 70, to extend parallel to the snatch roll 157. A spring 165, interposed between the front end of the actuator 158 and an anchor plate 166, yieldably urges the actuator to rock clockwise, and thus normally maintains the actuator in the position shown in Figure l with its front end part 163 bearing against the abutment or guide plate 164. Another abutment 167 is disposed below the abutment 164, and is slotted to receive and guide the lower extremity of the actuator part 163 for sliding movements.

In order to apply a power impulse to the link 141,

the actuator 158 is operatively but indirectly connected to the driving member 157, the actuator itself never engaging the driving member. Mechanism for bringing about the operative connection of the actuator element 158 to the member 157, includes an interponent pawl or coupler 168, pivoted as at 169 on the actuator. A spring 170, anchored to the actuator 158 and connected to the pawl part 168, biases or urges the latter to rock clockwise so as to move its nose 171 into transient engagement with the snatch roll 157. Normally, the pawl is maintained out of engagement with the snatch roll by the restraining action of a control element or trigger 172 which is pivoted as at 173 on the actuator 158. In the normal position of the trigger, its rear end 174 engages a holding surface 175 on the pawl so as to prevent the spring 170 from rocking the pawl 168 into drivetransmitting engagement with the driving member 157. The pawl 168 is formed with an inclined resetter cam face 176 which is located just below the holding surface 175', and which is acted upon by the trigger for rocking the pawl counterclockwise, and thus resetting it in normal, inoperative position.

The key operated lever 68, previously referred to, has an upward projection 177 disposed behind an arm 178 of the lever 73. Thelever 73 has another arm 178 on which a limber dog or flipper 179 is pivoted at 180. A spring 181 urges the limber dog 179 to rock clockwise to retain it yieldably in its normal position, of rest against a limit stop 182. The dog 179 can swing counterclockwise from the position shown in Figure l, but cannot move clockwise from this position. In the normal positions of the parts, the lower end of the limber dog 179 overlies acontact ear 183 on the actuator 158.

In operation, when a tabular key 50 is depressed, the universal plate 60 is rocked clockwise, as viewed in Figgure 1, to pull the link 65 downwardly androck the lever 68 counterclockwise, thereby rocking the lever 73 clockwise so as to cause the flipper 179 to push the actuator 158 downwardly to an initial extentsutficient to bring the trigger 172 into engagement with the abutment 167. This causes the trigger to be rocked clockwise about its pivot 173, so as to release the pawl 168, which is then moved by the spring 170 intoengagement with the snatch roll 157. The snatch roll then drives the pawl 168 and actuator 158 as a unit so as to rock the lever 168 and operate the link 141. When the pawl 168 is cast off from engagement with the snatch roll 157, the spring lifts the actuator 158 to bring the trigger 172 into engagement with the upper, trigger-resetting abutment 164. This causes the trigger 172 to be rocked counterclockwise, so as to move its end 174 against the resetting cam face 176 of the pawl 168, thereby restoring the latter to its inactive position, The parts of the mechanism D will then be returned toward their normal positions by a spring 184 interposed between a rearwardly extending arm 185 on the lever 160 and the lower part of a bracket 186 fixed to the frame cross bar 162. After unlatching of the lever 122 at the end of a tabulating run the tabular mechanism normalizing spring l50 assists the spring 184 to return the parts to their normal positions. The lever 160 is provided with a heel 187 engageable with the upper part of the bracket 186 for limiting the return movement of the lever 160 and the connected parts to their normal positions under the urge of the springs 150 and 184.

Means are provided for adjusting or varying the amount of driving impulse generated by the power mechanism D. This variation or adjustment is effected by variably limiting the extent to which the actuator pawl nose 171 enters a tooth interspace on the snatch roll 157 under the urge of the spring when the restraint of the trigger 172 on the pawl 168 is discontinued. In the form shown, the actuator 158 is provided with a downwardly extending stop elementor finger 188 which is disposed in front of and normally out of contact with a downwardly extending stop part, heel, or finger 189 on the pawl 168. When the pawl 168 is rocked clockwise by the spring 170 so as to move the pawl nose 171 into a snatch roll tooth interspace, the pawl stop 189 moves toward the actuator stop 188, which may be so positioned as to be engaged by the stop 189 to arrest rocking of the pawl 168 before the tooth 171 moves to the root of the snatch roll tooth interspace. By variably positioning one of the stops 188, 189, e. g., by bending the stop 18 8 towards or away from the stop 189, the extent to which the pawl tooth 171 enters the tooth interspace can be varied. Consequently, the angle through which the snatch roll rotates while in contact with the pawl, which determines the amount of driving of the pawl 168 and actuator 158 by the snatch roll 157, can be varied. Any suitable means or construction may be provided for adjusting one of the stops 188, 189 relatively to the other, but in the preferred construction the stop 188 is formed integrally with the actuator 158 so as to be bendable toward or away from the stop 189.

In typewriters or like machines in which all orsome of the instrumentalities to be operated, e. g., type bars, carriage return mechanism, tabulating mechanism, and escapernent mechanism, are operated by power, it may be desirable to provide means for varying collectively the extent of driving of the several actuator pawls corresponding to the pawl 168 and associated with the other mechanisms referred to. This may be accomplished by providing a knock off bar 190 mounted on the main frame so as to extend under the front ends of all of the actuators corresponding to the actuator 158 shown in Figures 1 and 2. Any siutable means (not shown) may be provided for adjustably tilting or otherwise variably positioning the knock off bar 190 so that it will be engaged by the lower ends of the actuators to control the timing of disengagement of the associated actuator pawls from the snatch roll.

In Figure 1 there is shownan arm 191 secured to a shaft 192 mounted to rock on a bracket 193 carried by the frame cross bar 162. The arm 191 is in the path of a pin 194 on the operating link 1 51. When the link 141 moves forwardly to effect a tabulating operation, the pin 194 rocks the arm 191 and shaft 192. The latter is connected to key interlocking mechanism which is not shown but which may be of the kind disclosed in the copending application of John F. Kloski et al., Serial No. 209,619, filed February 6, 1951, now Patent No. 2,633,966, issued April 7, 1953. The interlocking mechanism prevents undesirable conjoint operation of certain keys and their associated mechanisms.

Mechanism of the kind described above may also be embodied in typewriters equipped with only the usual or single frame-mounted tabular stop instead of the plurality of denominational stops 38. In such machines the denominational keys 50, the connections 78 and the stop devices 38 may be omitted and the lever 68 may be equipped with a finger key part 195, depression of which Operation Normally the parts will be in the positions shown in Figures 1, 4, 7, and 8, with a carriage-mounted stop set in operative position as indicated at 28' and with all of the frame-mounted stops 38 retracted and in their upper positions. In order to tabulate the carriage to, say, its first denominational position, the rightmost key 50, as viewed from the front of the machine, is depressed so as to act through its associated connections 78 and lower the associated stop device 38 to its intermediate position in which it will be coupled to the actuator 93. Depression of the key 59 also will rock the universal plate 69 and, through the link 65, will rock the lever 68 and, in turn, the lever 73 so as to move the actuator 158 downwardly and cause the pawl 168 and the actuator 158 to be driven by the snatch roll 157. Forward movement 12 of the actuator 158 will act through the lever 160 to pull the link 141 forwardly, thus transmitting cushioned rocking effort through the lever 143 and spring 147 to the operating lever 122 so as to move the latter to its operative position in which it will be latched by the latch 125. Rocking of the operating lever 122 will rock the shaft 111 and lever 112 to lift the escapement rack 13, and will rock the actuator 93 so as to place the selected and coupled stop blade 38 in its operative position as shown in Figure 9.

ilhen the carriage-mounted stop 28' engages the operatively positioned stop 38, the latter will be moved to the right as viewed in Figure 7 so as to move the other stops 38 and the actuator abutment finger 160 to the right until the latter is pressed against the upper part of the support $22. If the carriage is traveling relatively slowly at the time of engagement of the stop 2 with the stop 33, the resultant axial movement of the shaft 92 will move the interponent 129 and the latch 12S substantially concurrently so as to effect a substantially immediate releasing of the latch to permit the normalizing spring 150 to return the levers 143 and 122 to their normal positions, thus reestablishing the engagement of the escapement rack 13 with the escapement pinion 19, and retracting the actuator and the selected stop 38. On the other hand, if the carriage is travelling relatively rapidly at the time of engagement of the stop 28 with the stop 38, the resultant axial movement of the shaft 92 will move the interponent 129 to the position shown in Figure 10 without releasing the latch 125 immediately. Upon rebounding andsubsequent returning of the carriage to its stopped position, the interponent 129 will be rocked clockwise to free its nose 152 from the controlling stop 153 and the latch 125 will be rocked counterclockwise about its pivot 126, which will release the lever 122 and enable the parts to be returned to their normal positions.

The mechanism disclosed for the purpose of illustration embodies the invention in a preferred form, but it is intended that the disclosed mechanism be illustrative rather than definitive of the invention. The invention is defined in the appended claims.

I claim:

1. In a typewriting or like machine, a frame element; a carriage element mounted on said frame element for letter spacing and return travel; mechanism for driving said carriage element in letter spacing direction; feed controlling mechanism for normally causing said carriage element to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means on one of said elements; a support on the other of said elements and having a guide part; a tabular stop device having a guide slot normally receiving said guide part whereby said guide part and said guide slot normally retain said tabular stop device in a normal position in which it is not engageable with said tabular stop means; a second slot in said tabular stop device opening oppositely to said guide slot; an actuator normally disposed in alignment with said second slot but with said second slot and said actuator being normally displaced and disengaged from each other; means mounting said actuator 0n the other of said elements for movement transverse to the direction of carriage element travel; means for effecting relative movement between said tabular stop device and said actuator for disengaging said guide slot from said guide part and engaging said second slot with said actuator; means for moving said actuator and said tabular step device transversely to the direction of carriage element travel to thereby position said tabular stop device to be engageable with said tabular stop means; and means for conditioning said feed controlling mechanism to enable said carriage element to perform a tabulating run.

2. In a typewriting or like machine, a frame element; a carriage element mounted on said frame element for letter spacing and return travel; machanism for driving said carriage element in letter spacing direction; feed controlling mechanism for normally causing said carriage element to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means on one of said elements; a support on the other of said elements and having a guide part; a tabular stop device having a first guide surface normally engaging said guide part for determining the normal position of said tabular stop device in which the latter is not engageable with Said tabular stop means, a second guide surface parallel to and opposed in facing direction to said first guide surface, and an operating surface parallel to and opposed in facing direction to said second guide surface; an actuator mounted on said other of said elements for movement transverse to the direction of carriageelement travel and having a guide face parallel to and opposed in facing direction to said second guide surface and normally engaging said second guide surface, and an operating face parallel to and opposed in direction to said guide face and normally relatively displaced from said operating surface so as not to beengageable therewith; means for,

moving said tabular stop device parallel to said surfaces and said faces so as to juxtapose said operating surface relatlvely to said operating face; means for moving said actuator transversely to the direction of carriage element travel for causing said operating face to press against said juxtaposed operating surface to thereby move said tabular stop device into a position in which it is engageable with said tabular stop means; and means for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run.

3. In a typewriting or like machine, a frame; a carriage mounted on said frame for letter spacing and return travel; mechanism for driving said carriage in letter spacing direction; feed controlling mechanism for normally causing said carriage to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means on said carriage; a tabular stop device mounted on said frame for both vertical and horizontal movements and having two vertically spaced horizontal edges, one of said edges being formed with a first vertical slot having front and rear vertical walls, the front vertical wall being longer than the rear vertical wall, and the other of said horizontal edges being formed with a second vertical slot having front and rear vertical surfaces, the rear vertical surface being longer than the front vertical surface; a fixed locating member on said frame and extending into said first vertical slot for holding said tabular stop device in its normal position in which it is not engageable with said tabular stop means; an actuator normally engaging said longer vertical surface of said second vertical slot but being vertically spaced from and disengaged from the shorter vertical surface of said second vertical slot; means for moving said tabular stop device vertically to disengage the shorter vertical wall of said first vertical slot from said locating member and concomitantly to place the shorter vertical surface of said second vertcial slot in front of said actuator; means for moving said actuator horizontally forwardly to cause said actuator to push against the shorter front vertical surface of said second vertical slot and move said tabular stop device horizontally forwardly into a position in which it is engageable with said tabular stop means; and means for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run.

4. In a typewriting or like machine, a frame; a carriage mounted on said frame for letter spacing and return travel; mechanism for driving said carriage in letter spacing direction; feed controlling mechanism for normally causing said carriage to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means on said carriage; a plurality of tabular stop devices mounted on said frame in a pack and at letter space intervals for both horizontal and vertical movements, each of said tabular stopdevices having two vertically spaced horizontal edges, one of said edges being formed with a first vertical slot having front and rear vertical walls, the front verical wall being longer than the rear vertical wall, and the other of said horizontal edges being formed with a second vertical slot having front and rear vertical surfaces, the rear vertical surface being longer than the front vertical surface; a fixed locating member on said frame and extending into the respective first vertical slots for holding all of said tabular stop devices in normal positions in which none are engageable with said tabular stop means; an actuator normally engaging said longer vertical surfaces of said second vertical slots but being vertically spaced from and disengaged from said shorter vertical surfaces of said second vertical slots; means for moving a selected one of said tabular stop devices vertically to disengage the shorter vertical wall of its said first vertical slot from said locating member and concomitantly to place the shorter vertical surface of the second vertical slot of the selected tabular stop device in front of said actuator; means for moving said actuator horizontally forwardly to cause said actuator to push against the shorter front vertical surface of said second vertical slot of the selected tabular stop device and move said selected tabular stop device horizontally forwardly into a position in which it is engageable with said tabular stop means; and means for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run.

5. In a typewriting or like machine, a frame; a carriage mounted on said frame for letter spacing and return travel; mechanism for driving said carriage in letter spacing direction; feed controlling mechanism for normally causing said carriage to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means on said carriage; a tabular stop device mounted on said frame for both vertical and horizontal movements and having two vertically spaced horizontal edges, one of said edges being formed with a first vertical slot having front and rear vertical Walls, the front vertical wall being longer than the rear vertical wall, and the other of said horizontal edges being formed with a second vertical slot having front and rear vertical surfaces, the rear vertical surface being longer than the front vertical surface; a fixed locating member on said frame and extending into said first vertical slot for holding said tabular stop device in its normal position in which it is not engageable with said tabular stop means; an actuator normally engaging said longer vertical surface of said second vertical slot but being vertically spaced from and disengaged from the shorter vertical surface of said. second vertical slot; means for moving said tabular stop device vertically to. disengage the shorter vertical wall of said first vertical slot from said locating member and concomitantly to place the shorter vertical surface of said second vertical slot in front of said actuator; means for moving said actuator horizontally forwardly to cause said actuator to push against the shorter front vertical surface of said second vertical slot and move said tabular stop device horizontally forwardly into a position in which it is engageable with said tabular stop means; means for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run; means for latching said actuator in the position to which it has been moved so as to maintain said tabular stop device in position for engaging said tabular stop means; and means responsive to engagement of said tabular stop means and said tabular stop device for automatically restoring said actuator and said tabular stop device to their normal positions and for restoring said feed controlling mechanism to its normal condition.

6. In a typewriting or like machine, a frame; a carriage mounted on said frame for letter spacing and return travel; mechanism for driving said carriage in letter spacing direction; feed controlling mechanism for normally causing said carriage to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means 7 i on said carriage; a tabular stop device mounted on said frame for both vertical and horizontal movements; guide means engageable with said tabular stop device for nor mally preventing horizontal movement thereof but permitting vertical movement thereof; an actuator mounted to move horizontally and having an operating surface normally vertically displaced from and disengaged from said tabular stop device; a wire-like operating member having a bent crank connected to said tabular stop device for supporting the latter in its normal position of engagement with said guide means; a key for rocking said operating member to turn said crank and thereby move said tabular stop device vertically to an intermediate position in which it is engageable with the operating surface of said actuator; means for moving said actuator horizontally to move a part of said tabular stop device horizontally into a position in which it is engageable with said tabular stop means; and means operable in response tovoperation of said key for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run.

7. In a typewritiug or like machine, a frame; a carriage mounted on said frame for letter spacing and return travel; mechanism for driving said carriage in letter spac ing direction; feed controlling mechanism for normally causing said carriage to be fed by said driving mechanism 111 incremental letter spacing steps; a tabular stop means on said carriage; a tabular stop device mounted on said frame for both vertical and horizontal movements and having a stop head and a stem terminating in a connectmg portion spaced vertically from said head; guide means engageable with said tabular stop device head for normally preventing horizontal movement thereof but permittmg vertical movement thereof; an actuator mounted to move horizontally and having an operating surface normally vertically displaced from and disengaged from said tabular stop device head; a wire-like operating memher having a bent crank formed with a crank pin extending horizontally through and having threaded connection with said tabular stop device connecting portion for supporting said tabular stop device in its normal position with its stop head engaging said guide means; a key for rockmg said operating member to turn said crank and thereby move said tabular stop device vertically to an intermediate position in which its stop head is engageable with the operatlng surface of said actuator; means for moving said actuator horizontally to move said tabular stop device head horizontally into a position in which it is engageable with said tabular stop means, said horizontal movement of said tabular stop device head being accompanied by tilting of said tabular stop device about the threaded connection between said connecting portion and said crank pin; and means operable in response to operation of said key for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run.

8. In a typewriting or like machine, a frame; a carriage mounted on said frame for letter, spacing and return travel; mechanism for driving said carriage in letter spacing direction; feed controlling mechanism for normally causing said carriage to be fed by said driving mechanism in incremental letter spacing steps; a tabular stop means on said carriage; a plurality of tabular stop devices mounted on said frame in a pack and at letter space intervals for both horizontal I and vertical movements; an actuator mounted on said frame for horizontal movements; coupling means respectively on said tabular stop devices adapted to engage said actuator; means. for normally maintaining said tabular stop devices operatively uncoupled from said actuator including, for each tabular stop device, a wire-like operating member having a bent crank connected to said tabular stop device; keys respectively connected to said operating members for rocking a selected one of them to move the associated tabular stop device to a position in which its coupling means is coupled to said actuator; a universal member actuatable by operation any one Said y me ns responsive to actuation of said universal member for moving said actuator horizontally to move a part of the selected tabular stop device into the path of said tabular stop means; and means responsive to actuation of said universal member for conditioning said feed controlling mechanism to enable said carriage to perform a tabulating run.

9. Mechanism as set forth in claim.8 in which each wire-like operating member has a second bent crank engaged by the associated key.

10. Mechanism as set forth in claim 9 in which the second bent crank of each Wire-like operating member is provided with a spool-like connector element, said keys having bifurcated ends respectively straddling said connector elements between the end flanges thereof.

11. In a typewritiug or like machine, the combination of a frame element; a carriage element mounted on said frame element for letter spacing and return travel; mechanism for driving said carriage element in the letter spacing direction; feed controlling mechanism normally conditioned for effecting incremental letter spacing movements of said carriage element and being conditionable for enabling tabulating runs of said carriage element uninterruptedly through a plurality of letter spacing increments; tabular stop means on one of said elements; a tabular stop device; means mounting said tabular stop device on the other of said elements for limited movement parallel to the direction of carriage element travel and for movement transverse to the direction of carriage element travel to an inoperative position in which said stop device is not engageable with said tabular stop means and to an operative position in which said stop device is engageable with said tabular stop' means for arresting said carriage element at the end of a tabulating run with consequent limited movement of said tabular stop device parallel to the direction of carriage element travel; an inertia-controlled member operable for effecting returning of said tabular stop device to its inoperative position and restoring of said feed controlling mechanism to its normal condition; a part movable by said tabular stop device when the latter moves parallel to the direction of carriage element travel at the end of a tabulating run of said carriage element; and an impositive motion transmitting connection between said part and said inertia-controlled member, the inertia characteristics of said inertia-controlled member and the motion transmitting characteristics of said motion transmitting connection being so interrelated that when said part is moved relatively gradually in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively slowly said inertia-controlled member is immediately operated substantially in unison with movement of said part whereas, when said part is moved relatively quickly in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively rapidly, said inertiacontrolled member is operated with a delayed action after operation of said part.

12. In a typewritiug or like machine, the combination of a frame element; a carriage element mounted on said frame element for letter spacing and return travel; mechanism for driving said carriage element in the letter spacing direction; feed controlling mechanism normally condi -tioned for eifecting incremental letter spacing movements of said carriage element and being conditionable for enabling tabulating runs of said carriage element uninterruptedly through a plurality of letter spacing increments; tabular stop means on one of said elements; a tabular stop device; means mounting said tabular stop device on the other of said elements for limited movement parallel to the direction of carriage element travel and for movement transverse to the direction of carriage element travel to an inoperative position in which said stop device is not engageable with said tabular stop means and to an operative position in which said stop device is 17 engageable with said tabular stop means for arresting said carriage element at the end of a tabulating run with consequent limited movement of said tabular stop device parallel to the direction of carriage element travel; tabulation eliecting means operable for moving said tabular stop device to operative position and for conditioning said feed controlling mechanism for enabling a tabulating run of said carriage element; an inertia-controlled latch for releasably retaining said tabulation efiecting means in operated position; normalizing means for returning said tabular -stop device to its inoperative position and for restoring said feed controlling mechanism to its normal condition upon releasing of said latch; a part movable by said tabular stop device when the latter moves parallel to the direction of carriage element travel at the end of a tabulating run of said carriage element; and a motion transmitting spring connecting said part and said inertiacontrolled latch, the inertia characteristics of said inertiacontrolled latch and the motion transmitting characteristics of said motion transmitting spring being so interrelated that when said part is moved relatively gradually in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively slowly said inertia-controlled latch is immediately released substantially in unison with movement of said part whereas, when said part is movedrelatively quickly in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively rapidly, said inertia-controlled latch is released with a delayed action after operation of said part.

13. In a typewriting or like machine, the combination of a frame element; a carriage element mounted on said frame element for letter spacing and return travel; mechanism for driving said carriage element in the letter spacing direction; feed controlling mechanism normally conditioned for effecting incremental letter spacing movements of said carriage element and being conditionable for enabling tabulating runs of said carriage element uninterruptedly through a plurality of letter spacing increments; tabular stop means on one of said elements; a tabular stop device; means mounting said tabular stop device on the other of said elements for limited movement parallel to the direction of carriage element travel and for movement transverse to the direction of carriage element travel to an inoperative position in which said stop device is not engageable with said tabular stop means and to an operative position in which said stop device is engageable with said tabular stop means for arresting said carriage element at the end of a tabulating run with consequent limited movement of said tabular stop device parallel to the direction of carriage element travel; tabulation effecting means operable for moving said tabular stop device to operative position and for conditioning said feed controlling mechanism for enabling a tabulating run of said carriage element; an inertia-controlled latch for releasably retaining said tabulation effecting means in operated position; normalizing means for returning said tabular stop device to its inoperative position and for restoring said feed controlling mechanism to its normal condition upon releasing of said latch; a part movable by said tabular stop device when the latter moves parallel to the direction of carriage element travel at the end of a tabulating run of said carriage element; an interponent movable by said part and being mounted on said latch for movement in unison therewith and for movement relatively thereto; and a motion transmitting spring connecting said interponent to said latch and tending to cause said latch to move conjointly with said interponent when the latter is moved by said part, the inertia characteristics of said inerita-controlled latch and the characteristics of said motion transmitting spring being so interrelated that when said part and said interponent are moved relatively gradually in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively slowly said inertia-controlled latch is immediately moved and released substantially in unison with operation of said part and said interponent, whereas, when said part and said interponent are moved relatively quickly in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively rapidly, said inertiacontrolled latch is moved and released with a delayed action after operation of said part and said interponent.

14. In a typewriting or like machine, the combination of a frame element; a carriage element mounted on said frame element for letter spacing and return travel; mechanism for driving said carriage element in the letter spacing direction; feed controlling mechanism normally conditioned for effecting incremental letter spacing movements of said carriage element and being conditionable for enabling tabulating runs of said carriage element uninterruptedly through a plurality of letter spacing increments; tabular stop means on one of said elements; a tabular stop device; means mounting said tabular stop device on the other of said elements for limited movement parallel to the direction of carriage element travel and for movement transverse to the direction of carriage element travel to an inoperative position in which said stop device is not engageable with said tabular stop means and to an operative position in which said stop device is engageable with said tabular stop means for arresting said carriage element at the end of a tabulating run with consequent limited movement of said tabular stop device parallel to the direction of carriage element travel; tabulation efiecting means operable for moving said tabular stop device to operative position and for conditioning said feed controlling mechanism for enabling a tabulating runof said carriage element; an inertia-controlled latch mounted to rock about a first pivot for releasably retaining said tabulation effecting means in operated position; normalizing means for returning said tabular stop device to its inoperative position and for restoring said feed controlling mechanism to its normal condition upon releasing of said latch; an interponent mounted on said inertia-controlled latch to rock about a second pivot thereon spaced from said first pivot; a motion transmitting spring connecting said inertiacontrolled latch to said interponent at a point spaced from said second pivot and tending to cause said inertiacontrolled latch to rock about said first pivot conjointly with said interponent; and a part operatively connected to said interponent and being movable by said tabular stop device when the latter moves parallel to the direction of carriage element travel in consequence of the limited movement of said tabular stop device at the end of a tabulating run of said carriage element, the inertia characteristics of said inertia-controlled latch, the characteristics of said motion transmitting spring, and the relative locations of said pivots being so inter-related that when said part and said interponent are moved relatively gradually in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively slowly said inertia-controlled latch is immediately moved and released substantially in unison with operation of said part and said interponent, whereas, when said part and said interponent are moved relatively quickly in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively rapidly, said inertia-controlled latch is moved and released with a delayed action after operation of said part and said interponent.

15. In a typewriting or like machine, the combination of a frame element; a carriage element mounted on said frame element for letter spacing and return travel; mechanism for driving said carriage element in the letter spacing direction; feed controlling mechanism normally conditioned for eiiecting incremental letter spacing movements of said carriage element and being conditionable for enabling tabulating runs of said carriage element uninterruptedly through a plurality of letter spacing incre- '19 ments; tabular stop means on one of said elements; a tabular stop device; means mounting said tabular stop device on the other of said elements for limited movement parallel to the direction of carriage element travel and for movement transverse to the direction of carriage element travel to an inoperative position in which said stop device is not engageable with said tabular stop means and to an operative position in which said stop device is engageable with said tabular stop means for arresting said carriage element at the end of a tabulating run with consequent limited movement of said tabular stop device parallel to the direction of carriage element travel; tabulation effecting means operable for moving said tabular stop device to operative position and for conditioning said feed controlling mechanism for enabling a tabulating run of said carriage element; an inertia-controlled latch mounted to rock about a first pivot for releasably retaining'said tabulation efiecting means in operated position; normalizing means for returning said tabular stop device to its inoperative position and for restoring said feed controlling mechanism to its normal condition upon releasing of said latch; an interponent mounted on said inertia-controlled latch to rock about a second pivot there on spaced from said first pivot; a motion transmitting spring connecting said inertia-controlled latch to said interponent at a point spaced from said second pivot and tending to cause said inertia-controlled latch to rock about said first pivot conjointly with said interponent; a part operatively connected to said interponent and being movable by said tabular stop device when, the latter moves parallel to the direction of carriage element travel in com sequence of the limited movement of said tabular stop device at the end of a tabulating run of said carriage element, the inertia characteristics of said inertia-controlled latch, the characteristics of said motion transmitting spring, and the relative locations of said pivots being so interrelated that when said part and said interponent are moved relatively gradually in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively slowly said inertia-controlled latch is immediately moved and released substantially in unison with operation of said part and said interponent, Whereas, when said part and said interponent are moved relatively quickly in response to engagement of said tabular stop means with said tabular stop device when said carriage element is moving relatively rapidly, said inertia-controlled latch is moved and released with a delayed action after operation of said part and said interponent; a controlling stop; and means on said interponent engageable with said controlling stop in response to separate movement of said interponent unaccompanied by movement of said inertia-controlled latch for limiting said separate movement of said interponent and preventing subsequent movement and releasing of said inertia-controlled latch until rebounding of said carriage element in the return direction effects return movement of said part with consequent disengagement of said interponent means from said controlling stop.

References Cited in the file of this patent UNITED STATES PATENTS 1,440,118 Waldheim Dec. 26, 1922 1,945,895 Hart Feb. 6, 1934 2,353,095 Von Reppert July 4, 1944 2,478,630 Hill' Aug. 9, 1949 2,580,318 Pitman Dec. 25, 1951 

